Calling image = Image.open(data) image.thumbnail((36,36), Image.NEAREST) will maintain the aspect ratio. But I need to end up displaying the image like this: <img src=”/media/image.png” style=”height:36px; width:36px” /> Can I have a letterbox style with either transparent or white around the image? Answer PIL already has a function to do exactly that: from PIL import Image, … Read more
Closed. This question needs debugging details. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 6 years ago. Improve this question I am currently working on an application that requires high-performance conversion of an unpadded byte array to either a PNG or JPEG. … Read more
I found JPG does not support transparency, the alpha value is always 255. I am wondering only png supports transparency? Answer png-32 supports different levels of transparency. Each pixel can have an opacity between 0 and 255, with 0 as completely transparent. png-24 supports setting one color as fully transparent. Everything else will be opaque. … Read more
convert input.png -extent 100×100 -gravity center -background white output.png If the input is 50×50 the surrounding background is white. Can I somehow set this to transparent without declaring any color within input as transparent? Answer Use this instead: convert \ input.png \ -background none \ -gravity center \ -extent 100×100 \ output.png Note well: The … Read more
This question already has answers here: What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG? [closed] (14 answers) Closed 8 years ago. I’m building an app that uses a lot of images, so it’s getting pretty big. I got more than 15mb in PNG images, and if I convert those images … Read more
I have a bunch of high quality PNG files. I want to use PHP to convert them to JPG because of it’s smaller file sizes while maintaining quality. I want to display the JPG files on the web. Does PHP have functions/libraries to do this? Is the quality/compression any good? Answer Do this to convert … Read more
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 7 years ago. Improve this question Is there any free tool available for creating and editing PNG Images? Answer Paint.NET will create and edit PNGs … Read more
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 years ago. Improve this question I’ve been a web developer for quite some time, and I am used to transforming all … Read more
I want to know about uses of png files. There are two formats available for png images; one is png8 and the another one is png24. I would like to know that if I use either type in my html page, will there be any error? Or is this only quality matter? Answer There is … Read more
I have about 200 grayscale PNG images stored within a directory like this. 1.png 2.png 3.png … … 200.png I want to import all the PNG images as NumPy arrays. How can I do this? Answer According to the doc, scipy.misc.imread is deprecated starting SciPy 1.0.0, and will be removed in 1.2.0. Consider using imageio.imread … Read more
